It is best to go ahead and treat the vent if you see or smell mold without taking steps to determining exactly what type of mold might be present.
What does black mold in air vents look like.
According to the cdc the type of mold isn t important.
Mold spores can be spread through the air so it is no wonder that some can also grow and get stuck in air ducts.
In addition mold may appears as spots or different colors and it often has a distinct odor.
Take a good look and a good whiff at the vent.
When the heat or air conditioning is turned on hundreds of thousands of mold spores blow out into the house.
Common causes of black mold in air vents.
Because of its presence then mold starts to grow.
You can see the same principle at work when you drink an icy beverage and water beads up on the outside of the glass.
On hot days cool air that flows through the vents will cause the moisture in the air to condense inside the vent.
Black dust around air vents.
Those mold spores can make you sick.
If the air vent is very old and rusted it is a good idea to scrape away all rust and rough patches with a wire brush.
One of the first signs that black mold is growing in your air vents is a distinct musty mildew like smell in specific rooms or even throughout your entire home.
Air conditioner vents can be breeding grounds for black mold.
Look for the first signs of mold around ac vents in the ducts and in the drip pans.
Condensation forms in the coils and ducts as cool air circulates through the system creating a habitat for moisture loving mold.
As cool air flows through the vents on hot days the moisture in the air can condense inside the air vent.
Mold does have a tendency to grow inside air conditioners that sit unused for a while.
After cleaning the air vent and letting it dry i highly recommend coating the air vent with a sealing spray paint such as kilz which will help prevent new mold growth.
However when black mold starts growing in your air vents things get a little trickier.
When black mold grows on walls floors carpets and so on it s relatively easy to spot.
Mold in hvac heating ventilation and air conditioning systems like that shown below is particularly problematic because homeowners often don t realize it s there.
If you notice black dust around your air vents this.
Mold in air ducts most commonly occurs when there is moisture inside the ductwork.
You may also be able to see the presence of mold around drip pans air ducts and within intake vents.